Why does the repeated activation of the muscles cause fatigue?(a) Due to the aerobic breakdown of glycogen(b) Due to the breakdown of glucose(c) Due to glycogen formation(d) Due to lactic acid accumulationThis question was posed to me in an online quiz.My query is from Locomotion & Movement in section Locomotion and Movement of Biology – Class 11

Why does the repeated activation of the muscles cause fatigue?(a) Due

1.	Why does the repeated activation of the muscles cause fatigue?(a) Due to the aerobic breakdown of glycogen(b) Due to the breakdown of glucose(c) Due to glycogen formation(d) Due to lactic acid accumulationThis question was posed to me in an online quiz.My query is from Locomotion & Movement in section Locomotion and Movement of Biology – Class 11
Answer» The CORRECT CHOICE is (d) Due to lactic acid accumulation To explain: The repeated activation of the muscles leads to the anaerobic breakdown of GLYCOGEN. This takes PLACE due to the unavailability of oxygen. This RESULTS in the formation of lactic acid, which accumulates and causes fatigue.

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